Process for producing solvents and emulsifying agents



Patented Aug. 4, 1931 UNITED STATES.

FRIEDRICH POSPIECH,

PATENT OFFICE OF D'RESDEN, GERMANY, ASSIGNOR TO OHEMISCHE FABRIK POTT &00., OF DRESDEN, GERMANY rnocnss FOR PRODUCING sonvnn'rs ANDEMuLsIFYIive Aenn'rs no Drawing. Application filed August 26, 1927,Serial No. 215,764,;nd in Germany February 25, 1926.

Numerous processes have. already been proposed for the production ofsolvents and emulsifying agents for liquid and solid substances whichare themselves insoluble in Water, such as for instance oils, fats,mineral oils, hydrocarbons, waxes and the like.

In addition to the means such as soap and Turkey red oil T which havebeen used for some time, cyciohexanol or its homologues by themselves'orin combination with hydro: carbons has been converted for instance forthis purpose into a form soluble in water by means of soaps. v

It has been found, that particularly good results are obtained, ifaromatic or aliphatic alcohols, which are diflicultly soluble or 111-.

soluble in water, are treated, either by themselves or in combinationwith hydrocarbons, with the alkali salts of aromatic. or hydroaromatichydrocarbon sulfonic acids or their derivatives as well as also with thecorresponding free acids.

Benzyl alcohol and mixtures of benzyl alcohol with ordinary orchlorinated solvent naphtha have proved particularly suitable for thepurpose in view.

Benzyl alcohol has a distinctive character as compared with the alcoholsof high molecular weight. which are insoluble in water, such ascyclohexanol amyl alcohol terpene alcohols, since it possessesparticular technical advantages, which make it "especially suitable forthe purpose in question.

The surprising discovery has been made, that it does not affect thefrothing capacity of the preparations obtained. It is this fact inparticular, which is of pro-eminent importance for cleansing andemulsifying agents; In addition however, benzyl alcohol has theadvantage, that it has only a. very slight odor. This fact is alsoimportant, because it is particularly desired in the industry to employproducts which are as far 1 as possible odorless. as it is difficult toeliminate such odors from the treated textile materials, andinconveniences are thus caused to those dealing therewith.

In this manner productsare obtained,

h which can be used very effectively as solvents and emulsifying agentsfor fats of all kinds,

Ewamples 1. 15 parts of butyl naphthalene sulphonic acid are dissolvedin parts of water, and 28 parts of solvent naphtha are added thereto.The resulting emulsion is converted by means of 8 parts'of normal butylalcohol into a clear solution,which when mixed with or poured into aconsiderable amount of water yields finely dispersedv emulsions of thesolvent.

2. 25 parts of the sodium salt of isopropylnaphthalene sulphonic acidare dissolved in through several non-homogeneous intermediary stages, aclear'homogeneous liquid is finally obtained, WhlCll when diluted with aconsiderable amount of water, yields clear solutions of benzyl alcohol,which are not even opalescent. As is well known benzyl alcoholdissolvesvery sparingly in water.

alone.

I cla1m 1'. As a new article ofmanufacture, an

sodium salt of isopropyl-naphthalene sulfonic acid in the proportion ofabout 14 parts of benzyl alcohol to 25 parts of the sodium salt.

FRIEDRICH POSPIECH.

